In retrospect, the controversy is overblown and the showrunners and mainstream media threw gasoline on it.
So it seems that some people were concerned that Adora was a boyish waif, before the show even came out. The media called then entitled manchildren and pedophiles.
Tumblr artists drew art in support of the show, which generally depicted Adora as more feminine than she is in the actual show.
When the show came out, the media lauded it solely for the cast being all queer rather than the actual writing (which is generally mediocre). The fans now fetishize Adora/Catra (who are both CHILDREN); ironic considering that the media previously mocked critics as pedophiles.
The showrunners mocked the original series (which has a notable LGBT following) and virtued signaled about how diverse they were. Also, they seem to have graduated from the Cal Arts school of terrible design. The animation is atrocious.
Mattel wants nothing to do with the show. All their merchandise has been focused on the 80s cartoons. (Poor poor 00s reboot, we knew ye well. Well, not really.) I expect they will pull the plug as soon as the contract expires and make a new reboot to sell merchandise, and probably hire Studio Mir to animate.
Basically, a bunch of tumblr artists took an established IP and decided to use it as window dressing for their personal tumblr cartoon and didn't care about how this would alienate the existing fans or appeal to anyone who isn't a tumblrite, without even talking to the people who actually own the IP they are licensing. When questioned, they responded with predictable vitriol and hypocrisy.
As far as qualitative criticism goes, I find it trivially easy to shred this show on its own merits. Mostly because it was written by a clearly inexperienced team who didn't really know what they wanted to do besides code the majority cast as LGBT+.
The world building is terrible. We are expected to believe the Horde is at war with the monarchies, yet we rarely see evidence of this beyond lipservice and problems of the week. Both sides are using child soldiers for high ranking positions, which implies either incredible stupidity on the part of Hordak and the monarchy or that the previous conflicts killed off most of the adult soldiers (which in a realistic setting would be a big deal). Yet the child soldiers generally act like teenagers, not spartans or sardukar like you would expect. The world building is just terrible and indicates the writers are completely ignorant of military scifi.
She-Ra is nothing more than an LGBT+ rom-com soap opera masquerading as an edgy kid's show. This makes it fail at all those genres.
It's offensive to heterosexual cisgirls and transgirls because it implicitly assumes you cannot be a strong female character without being gay and butch. Even the SwanQueen pairing in the OUAT fandom felt perfectly natural given Swan and Regina's interactions and many hardships over the first few seasons, and both of them were canonically heterosexual and suffered from a "Cartwright curse" (their every boyfriend was doomed to die).
The Catra/Adora ship is creepy on so many levels. They're kids (pedophilia alert!), they're foster sisters (incest alert!), and child soldiers. Even ignoring that, they have no romantic chemistry. Their "relationship" is forced by the writers to get brownie points from the media (much like how OUAT's later crappier seasons infamously had Red Riding Hood and Dorothy Gale fall in love after knowing each other for all of five minutes). It never develops naturally and is at creepy odds with their sisterly interactions. Their childhood flashback episode highlights this. Their touchy-feely interactions in the FIRST episode feel like siblings, not potential romantic partners. They literally shared the same bed their whole lives. Seriously, has tumblr never heard of the Westermark effect? It is impossible for two people to have a lifetime relationship that isn't sexual?
So, yeah, I think the show is mediocre, the fandom is perverse, and the media is incompetent.
Even so, I did find myself liking the new Enraptra. Probably because I always loved non-evil mad scientist characters, and not because the show did anything original.